I agree that the quad 57 is a masterpiece, I own an excellent pair (set-up just as you describe) of them and bring them into the main room to listen to them from time to time to recalibrate.
Most of the time I use my ESP Bodhran SE's and while they do not do the things a Quad 57 does best quite as well as the original they are as close as I have found with a box speaker and they do do some things a bit better.
Most of the time I use my ESP Bodhran SE's and while they do not do the things a Quad 57 does best quite as well as the original they are as close as I have found with a box speaker and they do do some things a bit better.